Improvement in saw-mill-carriage attachments



A. J. MOOOLLUM & T. SEBLY. Saw-Mill Carriage Attachment.

No. l99,084.- Patented .lan. 8,1878.

7 I WITNESSES I Q ATTORNEYS.

N. PETERS. FHDTO-UTNOGRAFNER. WASHINGTON. D. C.

UNITED ST TES PATE T OFFICE.

ANDREW J. McOOLLUM AND THOMAS SEELY, or INDIANAPOLIS, INDIANA, ASSIGNORSTO THEMSELVES AND GEORGE D. EMERY, or SAME PLAcE.

IMPROVEMENT IN SAW-MILL-CARRIAGE ATTACHMENTS. 0

Specification forming part of Letters Patent No. 199,084, dated January8, 1878; application filed November 12, 1877.

riage Attachment, of which the following is a specification:

In the accompanying drawings, Figure 1 represents a perspective view ofa saw-mill carriage with our improved attachment for cutting boards forbarrel-heads, and Fig. 2 a side elevation of the same.

Similar letters of reference indicate corresponding parts.

This invention is intended to furnish an improved attachment for theordinary saw-mill carriage, whereby logs, after being quartered, can becut up for tight barrel headings and staves for the full length of logs,the boards being then cut with butting-saws into pieces of the properlength desired.

The attachment is so constructed as to be quickly applied to or taken011 from the sawcarriage, so that the quartered log can be cut up withthe grain to the proper thickness for tight barrel-heads at the same orless expense than it costs to rive the quarters or eighths and saw themthe proper length.

The invention consists of detachable supporting-posts, which are securedto keepers of the saw-carriage. The corner posts carry a swinging bar,to which the quarter log is attached by dogs, while the third centerpost carries a lever and pawl, that look into racks of an arc-shaped armof the swinging bar, to adjust the log successively to the action of thesaw.

In the drawings, A represents a saw-mill carriage and head-blocks of thesame, and B B are cross-pieces that are permanentlyfastened to thecarriage, so as to secure the attachment thereto.

The cross-pieces are provided withflanged or dovetailed guide-pieces a,that are slightly inclined toward each other, so as to wedge the flangedbase of the posts 0 O securely when attached thereto.

The supporting cross-pieces and guide-pieces are entirely out of the wayfor the common saw-mill purposes, and admit the attaching of the postswithout any hinderance.

A post, 0, is secured to each corner of the carriage, and a third one tothe center crosspiece B.

The corner posts 0 are slotted at the upper ends, to form bearings forthe pivots b of a swinging bar, D, with rigid end pieces or arms atright angles thereto. The posts 0 are of proper height, so as toaccommodate the mean radius of the logs.

The swinging bar D is provided with dogs D, that slide in guide-slots d,and are operated by an eccentric lever-cam, E, and pivotedconnecting-rod E, so as to be firmly applied to the quarter log forholding the same. From the center of the swinging bar D extends at rightangles an arc-shaped arm, F, with a square rack, F at one side, and abeveled rack, F, at the other side, into which a handlever, G, and aspring-pawl, G, of the middle post 0 enter, so as to adjust the swingingbar to any inclination thereon.

When the logs are quartered on the sawmill and the knees run out of theway, the posts 0 are inserted into the guides of the cross-pieces, andthe swinging bar and racks hung and secured by the lever and pawl. Thequarter log is then clamped by the sharp dogs to the swinging bar, andcut up any width up to fourteen inches wide, and sawed with the grain inthe same manner as if rived out to the thickness of seven-eighths of aninch on sap edge and three-eighths of an inch on heart edge.

The quarter log is fed to the action of the saw by the hand-lever andpawl, that are adjusted in the teeth of the racks, the teethcorresponding to the thickness of the boards to be cut from the quarterlog. The barrel heads or staves are then. cut from the tapering boardsso obtained in any suitable manner, the attachment dispensing withriving, and producing uniform boards with the same saw that is used forcommon saw-mill purposes.

Having thus described our invention, We

claim as new and desire to secure by Letters Patent The combination ofthe supporting corner and middle posts 0 O and of a swinging log-

